Roughly speaking, Nintendo appears to be off to a pretty good start with their smartphone games.
SURE, there was a bit of outcry over the fact that Super Mario Run was $10 and people who regularly play free-to-play games weren't quite used to that but it also ended up energizing sales for Super Mario Maker 3DS and other Mario titles since its release. And y'know, there's the whole Pokemon GO thing as well, even if that's actually developed by Niantic and not Nintendo (though they have some stakes in it), but that's neither here or there.
At any rate, you can expect Nintendo to keep up the smartphone releases for the foreseeable future. Nintendo president Tatsumi Kimishima stated in a recent investor Q&A that the company plans to release "two to three" games a year and that they would primarily serve as a way of introducing the company's intellectual property to a wider audience.
So far the company has released three games on smartphones since March 2016: Miitomo, Super Mario Run, and the recently released Fire Emblem Heroes. An Animal Crossing game was expected to release before the end of this March, but has now been pushed back to the end of 2017.
Given that two games have been announced for this year so far (and one has already released), it's likely we'll hear about a third at some point.
What are your thoughts on Nintendo's smartphone games so far?